[laouichi sif]

Hi ,
I have a 2D Car model and I want to to create type of hybrid mesh with GMSH (structured boundary layer and an unstructured far field region) but I failed
Helpe me pls !!!!

[tareqkh]

Hey,

Can you provide more details so that we can guide you?

Thanks,

[laouichi sif]

Ok lets forget about the car model I have a geometry that I want to mesh it with Boundary Layer field in Gmsh :-


lc=0.1;

Point(1) = {0, 0, 0, lc};
Point(2) = {3, 0, 0, lc};
Point(3) = {3, 1, 0, lc};
Point(4) = {2.5, 1, 0, lc};
Point(5) = {2.5, 4, 0, lc};
Point(6) = {0.5, 4, 0, lc};
Point(7) = {2, 1, 0, lc};
Point(8) = {0, 1, 0, lc};
Line(1) = {1, 2};
Line(2) = {2, 3};
Line(3) = {3, 4};
Line(4) = {4, 5};
Line(5) = {5, 6};
Line(6) = {6, 7};
Line(7) = {7, 8};
Line(8) = {8, 1};




Point(9) = {-6, -0.2, 0, lc};
Point(10) = {9, -0.2, 0, lc};
Point(11) = {9, 6, 0, lc};
Point(12) = {-6, 6, 0, lc};
Line(9) = {9, 10};
Line(10) = {10, 11};
Line(11) = {11, 12};
Line(12) = {12, 9};




Line Loop(13) = {7, 8, 1, 2, 3, 4, 5, 6};
Line Loop(14) = {9, 10, 11, 12};
Plane Surface(15) = {13, 14};






Field[1] = BoundaryLayer;
Field[1].EdgesList = {1:8};
Field[1].FanNodesList = {1:3,5,6,8};
Field[1].NodesList = {1:8};

Field[1].Quads = 1;
Field[1].hfar = 0.1;
Field[1].hwall_n = 0.01;
Field[1].hwall_t = 0.0005;
Field[1].ratio = 1.1;
Field[1].thickness = 0.1;
BoundaryLayer Field = 1;




and the problem was in point 4 and 7 (the pic in the attachments ) .My Qs is how can I solve this problem ???

and thank you

[opedrofunk]

Take those nodes out of the nodes/edges/fans lists. Also, only include the FacesList and see what happens.

[laouichi sif]

Thank you so much Peter for your reply but its 2d so there is no facesList and how can I take those nodes out of the edgeslist !!

[opedrofunk]

Hi,
Did you try removing the NodesList and the FanNodesList?
ie, comment out these lines:
// Field[1].FanNodesList = {1:3,5,6,8};
// Field[1].NodesList = {1:8};
Regards,
Peter